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参数资料
| 型号： | TDA7521 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP44 |
| 封装： | 10 X 10 MM, 1.40 MM HEIGHT, TQFP-44 |
| 文件页数： | 4/11页 |
| 文件大小： | 97K |
| 代理商： | TDA7521 |
TDA7521
2/11
Figure 1. TDA7521 Block Diagram
1.0 HARDWARE DESCRIPTION
1.1 Clock source and generation
The master clock to operate the device is 768
×Fs (High Frequency mode, HFM) or 384×Fs (Low Frequen-
cy mode, LFM). Fs=44.1KHz for CD applications. In either case, the clock is generated by TDA7522: an
internal low-jitter Charge-Pump PLL (CPPLL) and a Finite State Machine (FSM) synthesize all the needed
clocks for the internal blocks: a 512
×Fs for the DAC and three 384×Fs (HFM) or 192×Fs (LFM), with dif-
ferent phases for ADCs and output digital multiplexer. The required loop filter network is made up of a
160pF capacitor from FILT to GND_pll in parallel with the series of a 10nF and a 4K
resistor. All clock-
related setups are communicated to TDA7521 via UART interface.
1.2 Voltage references
REFIN is an internal voltage reference generated by a resistor divider between VCC_dac and VSS_dac.
Nominal value (with VCC_dac=5V) is REFIN=2.5V. Careful filtering of this pin is essential; recommended
value of external capacitor is 47
F paralleled with 100nF ceramic. REFOUT is a 2.5V (nominal) buffered
output to bias the pickup. All the internal voltage references for ADCs and DACs are generated by band-
gap-based circuits, thus allowing to reduce the noise induced by the power supply.
AC
BD
E
F
SDA
SCL
LD MD
DL
DR
OUTL
OUTR
Control I/F
Laser
Driver
Stereo
DAC
RF
ADC
Servo
ADC
RF
ADC
I/V
Output MUX
d0
d1
d2
d3
d4
d5
d6/OF
d7/UF
SYNC
HF MON
REF
Gen
REF IN
REF OUT
PON
REXT
CLOCK
Mgr
CKIN
FILT
MUTEL MUTER
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TDA7522 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Digital Servo & Decoder |
| TDA7528 | 功能描述:射频接收器 AM/FM car radio Front-End IF Signal RoHS:否 制造商:Skyworks Solutions, Inc. 类型:GPS Receiver 封装 / 箱体:QFN-24 工作频率:4.092 MHz 工作电源电压:3.3 V 封装:Reel |
| TDA7528TR | 功能描述:音频放大器 AM/FM car radio Front-End IF Signal RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TDA7529 | 功能描述:调谐器 RF front-end AM/FM DSP car-radio IF Sig RoHS:否 制造商:NXP Semiconductors 功能: 噪声系数: 工作电源电压: 最小工作温度: 最大工作温度: |
| TDA7529_11 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:RF front-end for AM/FM DSP car-radio with IF sampling |
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